/*
 *                 Sun Public License Notice
 * 
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 * 
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.xml.tree.lib;

import org.netbeans.modules.xml.tree.settings.TreeEditSettings;

/**
 *
 * @author  Libor Kramolis
 * @version 0.1
 */
public final class StringUtil {

    /**
     */
    public static String printableValue (String value) {
        if (value == null)
            return ""; // NOI18N

        int ch;
        int len;
        int prefLen = TreeEditSettings.getDefault().getPrintableValueLength();
        if ( prefLen == 0 ) {
            len = value.length();
        } else {
            len = Math.min (value.length(), prefLen);
        }
        StringBuffer sb = new StringBuffer (2 * len);
        for (int i = 0; i < len; i++) {
            ch = value.charAt (i);
            if ('\r' == ch) {
                sb.append("\\r"); // NOI18N
            } else if ('\n' == ch) {
                sb.append("\\n"); // NOI18N
            } else if ('\t' == ch) {
                sb.append("\\t"); // NOI18N
            } else if ('\b' == ch) {
                sb.append("\\b"); // NOI18N
            } else if ('\f' == ch) {
                sb.append("\\f"); // NOI18N
//  	    } else if ('"' == ch) {
//  		sb.append("\\\""); // NOI18N
//  	    } else if ('\\' == ch) {
//  		sb.append("\\\\"); // NOI18N
            } else {
                sb.append ((char)ch);
            }
        }
        if (value.length() > len)
            sb.append ("..."); // NOI18N

        return sb.toString();
    }

    

    public static boolean isWS(char ch) {
        return ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r';
    }

    /**
     * @param nest list of characters that symetrically delimit some inner token that
     *  can contain stop delimiter. e.g. <!ENTITY sdsd "sd>">
     */
    public static int skipDelimited(String text, int pos, char del1, char del2, String nest) {
        char ch = text.charAt(pos);
        if ( ch != del1) return -1;
        do {
            pos++;
            ch = text.charAt(pos);
            if (nest.indexOf(ch) >= 0) {
                pos = skipDelimited(text, pos, ch, ch, "");
                ch = text.charAt(pos);
            }
        } while (ch != del2);
        return pos + 1;
    }

    public static int skipDelimited(String text, int pos, String del1, String del2) {
        if (text.startsWith(del1, pos)) {                    
            int match = text.indexOf(del2, pos + del1.length());
            if (match == -1) return -1;            
            return match + del2.length();
        } else {
            return -1;
        }
    }

    public static int skipWS(String text, int pos) {
        if (isWS(text.charAt(pos))) {
            return pos + 1;
        } else {
            return -1;
        }
    }

        
    /**
    * @param args the command line arguments
    */
    public static void main (String args[]) {
        
        String idtd = "     ]>"; // NOI18N
        int pos = 0;
        int now = 0;
        int last = -1;

        System.err.println("SkipWs" + skipWS(" k", pos));        
        
        System.err.println("SkipDelinitedchar" + skipDelimited("<  ' > '>", 0, '<', '>' ,"\"'"));
        
        System.err.println("SkipDelinitedchar" + skipDelimited("", 0, ""));
        
        while (idtd.substring(pos).startsWith("]>") == false && last != pos) { // NOI18N

            last = pos;
            
            for (now = 0; now != -1; now = skipWS(idtd, pos)) pos = now;
            
            for (now = 0; now != -1; now = skipDelimited(idtd, pos, "")) { // NOI18N
                pos = now;
                for (now = 0; now != -1; now = skipWS(idtd, pos)) pos = now;
            }

            for (now = 0; now != -1; now = skipDelimited(idtd, pos, '<', '>' , "\"'")) pos = now; // NOI18N

//            while(skipWS(idtd, pos)); 
//            while(skipDelimited(idtd, pos, "")) { while(skipWS(idtd, pos));};

//            skipDelimited(idtd, pos, '%', ';' , "");
        }
        
    }
        
}